We set up text message alerts on both our CU accounts and our credit card. Anything over $500 and we get a ping. Oh, and ANY transaction at a gas station triggers an alert.
If I ever found a credit card, the first place I would go is a gas station and tank up. They check nothing there.
That only works if you know the mailing zip....the pumps ask you what the zip code of the credit card owner is.
I have that set up on my credit cards to alert me for ANY amount and here's why. I got an early morning phone call from my Capital One credit card about a 57 cent purchase on the card, which they took to be a "testing" charge ... nothing big that would raise alarms but so small I might not notice. They said that's a trick of fraudsters to see if the card holder is paying attention, and if they're not, they'll go back and charge something big.
Cap One was on it immediately. The card was cancelled and they issued me a new one.
WADR, if I found a credit card I'd turn it in to the appropriate authority.
The gas station pumps around here require the card billing zip code to be entered.